If you are sure that all the hardware is installed correctly and
working (device manager)-and all the cables from cd/dvd drives
are connected properly and you have installed the drivers and
audio applications and you are plugged into amplified speakers then.............
Run the audio diagnostics utility or the creative speaker utility.
This will allow you to setup and test your speakers.
You didnt say anything about where you were having problems,
listening to audio from the cd/dvd drive or an mp3 file on your
hard drive etc.